(1) My mate Roland Davis recommended them as Easy, Fun and Challenging
(2) V&B uses Big Bases. No fiddling around with the rules to make my big bases work.
(3) V&B uses the brigade/regiment as the tactical unit. The brigade/regiment is probably the best level of abstraction for all the major battles of the Peninsular War. Admittedly at Albuera Beresford showed an undue interest in where particular battalions stood and in which formation they deployed, however, he might have fought a better battle if he had left this to his subordinates. Generally an army commander would leave that level of detail to the local commanders. This is, for example, exactly what Soult did at the same battle.
(4) Because the tactical units are brigades/regiments V&B demands far less figures than competitors. About a third of the figures/units when compared to Shako and other games with battalions as the basic unit. Assuming of course that you base the unit the same regardless of the rules, in my case a unit of infantry has 24 figures whether used as a battalion or a brigade. Collecting the armies for Albuera using Shako would have taken another couple of life times.